CN215806728U - Ultra-low temperature valve adds long valve gap structure - Google Patents
Ultra-low temperature valve adds long valve gap structure Download PDFInfo
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- CN215806728U CN215806728U CN202121925313.XU CN202121925313U CN215806728U CN 215806728 U CN215806728 U CN 215806728U CN 202121925313 U CN202121925313 U CN 202121925313U CN 215806728 U CN215806728 U CN 215806728U
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Abstract
The utility model relates to an ultra-low temperature valve lengthened valve cover structure, which comprises a packing component (5), an upper lip-shaped sealing ring (7), a lengthened valve cover (8), a lengthened valve rod (10) and a lower lip-shaped sealing ring (12); the lengthened valve rod (10) is installed in the lengthened valve cover (8), the lengthened valve cover plays a role in supporting and positioning the lengthened valve rod, and the lengthened valve rod drives the valve core to move through the transmission torque of the operating mechanism, so that the valve is opened or closed. The utility model relates to an ultra-low temperature valve lengthened valve cover structure, which solves the sealing problem of an ultra-low temperature valve lengthened valve rod, and can realize transverse installation of an ultra-low temperature valve and online replacement of fillers under a certain working condition; the extension valve rod is provided with triple sealing, a sealing cavity pressure relief device and an anti-static device, and has a good practical effect on the ultralow temperature environment, particularly on the working condition that a medium is easy to gasify and explode.
Description
Technical Field
The utility model relates to a lengthened valve cover structure of an ultralow-temperature valve, which can be applied to rotary opening and closing ultralow-temperature valves such as ultralow-temperature ball valves, ultralow-temperature butterfly valves, ultralow-temperature plug valves and the like.
Background
In recent years, the ultralow temperature valve in China is rapidly developed, a large number of ultralow temperature valves are applied to LNG and petrochemical plants, in the using process, due to space limitation, part of the ultralow temperature valves need to be transversely installed, the original ultralow temperature valves in the market are limited by the structure of the ultralow temperature lengthened valve cover, the valves are not allowed to be transversely installed, GB/T24925 and BS 6364 clearly stipulate that the installation inclination angle of the valves is not more than 45 degrees, the reason is that the installation inclination angle of the valves is too large or transversely installed, a pipeline low-temperature medium can directly contact with sealing filler on the upper end of the lengthened valve cover, the sealing filler is in an environment far lower than 0 ℃, the filler is damaged in a sealing mode, and finally the accident of valve external leakage is caused. Secondly, after the valve ultralow temperature valve is used for a long time, the filler is abraded, the online replacement is influenced by the pipeline process, the pipeline medium cannot be completely isolated, and the filler cannot be directly removed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the ultralow temperature valve needs to be transversely installed due to site limitation and the requirement of online replacement of a packing assembly and improve the external sealing performance of a valve rod of the ultralow temperature valve, the utility model provides a lengthened valve cover structure of the ultralow temperature valve, which adopts a triple sealing mode, adopts lip-shaped sealing rings at the upper end and the lower end of the valve rod respectively, can effectively isolate a medium and realizes the removal of the packing for packing replacement operation under a limited environment; a pressure relief device is arranged to realize automatic pressure relief of the closed cavity between the valve rod and the valve cover; in addition, the use safety of the valve is improved by arranging the anti-static device.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides an ultra-low temperature valve lengthened valve cover structure which comprises a packing assembly, an upper lip-shaped sealing ring, a lengthened valve cover, a lengthened valve rod and a lower lip-shaped sealing ring, wherein the packing assembly is arranged on the upper lip-shaped sealing ring; the lengthened valve rod is arranged in the lengthened valve cover, is limited through the anti-flying-out gasket and is circumferentially positioned through the positioning block and the shaft sleeve, so that the lengthened valve rod performs rotary motion relative to the lengthened valve cover; triple sealing is realized between the lengthened valve rod and the lengthened valve cover through an upper lip-shaped sealing ring, a lower lip-shaped sealing ring and a packing assembly.
In the utility model, the two groups of lip-shaped sealing rings, namely the upper lip-shaped sealing ring and the lower lip-shaped sealing ring, and the packing sealing assembly form sealing between the lengthened valve rod and the lengthened valve cover, and triple sealing is formed by the three groups of sealing elements, so that the medium can be effectively prevented from leaking from the lengthened valve cover.
Preferably, a closed cavity is formed between the lower lip-shaped sealing ring and the upper lip-shaped sealing ring as well as between the lower lip-shaped sealing ring and the packing assembly, the lengthened valve rod is provided with a pressure relief hole, and the end part of the pressure relief hole is provided with a steel ball, a spring and a hollow plug to form a one-way circulation device.
According to the utility model, the lengthened valve rod is provided with the pressure relief hole, the end part of the pressure relief hole is provided with the steel ball, the spring and the hollow plug to form the one-way circulation device, and the automatic pressure relief of the closed cavity of the lengthened valve cover is realized.
In any of the above technical solutions, it is preferable that a packing pressing sleeve and a packing pressing plate are arranged above the packing sealing assembly and connected with the lengthened valve cover through a packing bolt, and a disc spring is arranged between the packing bolt and the packing pressing plate to realize pressure compensation.
According to the utility model, when the valve is loosened after the filler is used for a long time, the pressure of the filler pressing plate for pressing the filler sealing component can be compensated through the disc spring, so that the long-time effectiveness of the filler sealing is ensured.
In any of the above technical solutions, preferably, the anti-flying-out gasket is disposed between the extended valve rod and the extended valve cover, so that the extended valve rod does not fly out from the top end of the valve due to pressure when the pressure in the valve middle cavity is increased.
In the utility model, the anti-flying-out gasket is arranged, so that when the pressure of the cavity in the valve rises, the lengthened valve rod is prevented from flying out of the top end of the valve due to the pressure, and the use safety of the valve is ensured.
In any of the above technical solutions, it is preferable that the extended valve stem is provided with a lower lip seal structure, so as to prevent the valve stem packing from being damaged at low temperature.
According to the utility model, the lip-shaped sealing ring structure below the lengthened valve rod is arranged, so that excessive low-temperature medium is effectively prevented from contacting the valve rod filler when the valve is inclined and transversely installed, and the valve rod filler is prevented from being damaged at low temperature.
In any of the above technical solutions, preferably, electrostatic conduction springs are further disposed between the extended valve rod and the extended valve cover, and between the extended valve rod and the valve core.
In the utility model, the static conducting spring is arranged, so that static generated by the valve internals is effectively led out to the valve shell, and the use safety of the valve is improved.
The preferred is in above-mentioned arbitrary technical scheme, it has the drip tray still to weld on the extension valve gap, increases the heat radiating area of extension valve gap, prevents that the comdenstion water from dripping into the heat preservation of below valve.
In the utility model, the drip tray is arranged and has the function of increasing the heat dissipation area of the lengthened valve cover, so that the sealing assembly is ensured to be above 0 ℃, and the valve rod cannot be scratched due to icing of the sealing assembly; the other function is to prevent the condensate water from dropping into the heat-insulating layer of the valve below and causing the damage of the heat-insulating layer.
The ultra-low temperature valve lengthened valve cover structure comprises a packing assembly, an upper lip-shaped sealing ring, a lengthened valve cover, a lengthened valve rod and a lower lip-shaped sealing ring; the lengthened valve rod is arranged in the lengthened valve cover, is limited through the anti-flying-out gasket and is circumferentially positioned through the positioning block and the shaft sleeve, so that the lengthened valve rod performs rotary motion relative to the lengthened valve cover; triple sealing is realized between the lengthened valve rod and the lengthened valve cover through an upper lip-shaped sealing ring, a lower lip-shaped sealing ring and a packing assembly; the lengthened valve rod is also provided with a pressure relief device, so that the closed cavity between the lengthened valve rod and the lengthened valve cover realizes automatic pressure relief; and antistatic devices are respectively arranged between the lengthened valve rod and the lengthened valve cover and between the lengthened valve rod and the valve core. Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:
triple sealing is arranged between the lengthened valve rod and the lengthened support, so that the medium can be effectively prevented from leaking from the lengthened valve rod of the valve, and the effectiveness of external sealing of the valve is ensured; the lip-shaped sealing ring below the lengthened valve rod can prevent a medium from directly contacting the packing component above the lengthened valve rod, and the situation that the valve cannot be installed due to space limitation in a construction site due to damage of the packing component and damage of the valve rod caused by icing of a packing part due to direct contact of excessive low-temperature medium with the packing component when the valve is obliquely installed or transversely installed is avoided; meanwhile, after the packing of the lengthened valve rod is damaged, the packing sealing assembly can be directly removed on site to be replaced under a certain working condition due to the sealing effect of the lower lip-shaped sealing ring, so that the maintenance time of the packing of the valve on site is shortened; the anti-static device is arranged between the lengthened valve rod and the lengthened support and between the lengthened valve rod and the valve core, and the static electricity of the valve inner part can be effectively led out through the connection between the valve shell and the grounding device, so that the fireproof safety of field use is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a preferred embodiment of an ultra-low temperature valve extension bonnet structure according to the present invention.
Reference numerals: the device comprises a packing bolt 1, a disc spring 2, a packing pressing plate 3, a packing pressing sleeve 4, a packing assembly 5, a positioning block 6, an upper lip-shaped sealing ring 7, a lengthened valve cover 8, a drip tray 9, a lengthened valve rod 10, a shaft sleeve 11, a lower lip-shaped sealing ring 12, an anti-flying gasket 13, a steel ball 14, a spring 15, a hollow plug 16 and an electrostatic conduction spring 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem that an ultralow temperature valve needs to be transversely installed due to site limitation and meet the requirement of on-line replacement of a packing assembly and improve the external sealing performance of a valve rod of the ultralow temperature valve, the embodiment of the utility model provides a lengthened valve cover structure of the ultralow temperature valve, which is provided with a lengthened valve rod, a lengthened valve cover and a sealing assembly, wherein the lengthened valve rod is arranged in the lengthened valve cover and limited by an anti-flying-out gasket, a positioning block and a shaft sleeve, and triple sealing is realized between the lengthened valve rod and the lengthened valve cover by an upper lip-shaped sealing ring and a lower lip-shaped sealing ring and a packing assembly; the lengthened valve rod is also provided with a pressure relief device, so that the closed cavity between the lengthened valve rod and the lengthened valve cover realizes automatic pressure relief; in addition, antistatic devices are respectively arranged between the lengthened valve rod and the lengthened valve cover and between the lengthened valve rod and the valve core.
The component composition, technical characteristics and implementation form of the ultra-low temperature valve lengthening valve cover structure described in the embodiment are described below with reference to fig. 1.
The ultra-low temperature valve lengthening valve cover structure mainly comprises a packing component 5, an upper lip-shaped sealing ring 7, a lengthening valve cover 8, a lengthening valve rod 10 and a lower lip-shaped sealing ring 12, as shown in fig. 1, the lengthening valve rod 10 is installed in the lengthening valve cover 8, is limited through an anti-flying-out gasket 13, and is circumferentially positioned through a positioning block 6 and a shaft sleeve 11, so that the lengthening valve rod 10 performs rotary motion relative to the lengthening valve cover 8; triple sealing is realized between the lengthened valve rod 10 and the lengthened valve cover 8 through the upper lip-shaped sealing ring 7, the lower lip-shaped sealing ring 12 and the packing component 5.
In this embodiment, the two sets of lip seals, i.e., the upper lip seal 7 and the lower lip seal 12, and the packing seal assembly 5 form a seal between the extended valve rod 10 and the extended valve cover 8, and three sets of seals form a triple seal, so that external leakage of a medium from the extended valve cover can be effectively prevented. Adopt and prevent flying out gasket and locating piece, axle sleeve to carry on spacingly to the extension valve rod, effectively prevent the incident of valve rod departure.
In this embodiment, as shown in fig. 1, a closed cavity is formed between the lower lip-shaped seal ring 12, the upper lip-shaped seal ring 7 and the packing assembly 5, the extended valve rod 10 is provided with a pressure relief hole, and a steel ball 14, a spring 15 and a hollow plug 16 are arranged at an end of the pressure relief hole to form a one-way flow device. A certain closed cavity is formed among the lower lip-shaped sealing ring 12, the upper lip-shaped sealing ring 7 and the packing sealing assembly 5, in order to solve the problem that the lengthened valve cover is damaged due to the abnormal rise of the pressure in the closed cavity, the lengthened valve rod 10 is further provided with a pressure relief hole, a steel ball 14, a spring 15 and a hollow plug 16 are arranged at the end part of the pressure relief hole to form a one-way circulation device, and the closed cavity of the lengthened valve cover is automatically relieved.
In this embodiment, as shown in fig. 1, a packing pressing sleeve 4 and a packing pressing plate 3 are disposed above a packing sealing assembly 5, the packing pressing plate 3 is connected to a lengthened valve cover 8 through a packing bolt 1, and a disc spring 2 is disposed between the packing bolt 1 and the packing pressing plate 3 to realize pressure compensation. Packing pressure sleeve 4 and packing pressure plate 3 are provided with above packing seal assembly 5, and packing pressure plate 3 is connected with extension valve gap 8 through bolt 1 to set up dish spring 2 between bolt 1 and packing pressure plate 3 and carry out pressure compensation, use for a long time when the valve and pack the pressure that appears relaxing back can compress tightly packing seal assembly 5 through dish spring 2 to packing pressure plate 3 and compensate, ensure the long-time validity of packing.
In this embodiment, as shown in fig. 1, the anti-flying washer 13 is disposed between the extension valve stem 10 and the extension valve cover 8, so that the extension valve stem 10 does not fly out of the top end of the valve due to pressure when the valve cavity is pressurized. The anti-flying-out gasket 13 is arranged in the structure of the embodiment, and when the pressure of the cavity in the valve rises, the lengthened valve rod 10 is ensured not to fly out from the top end of the valve due to the pressure, and the use safety of the valve is ensured.
In this embodiment, as shown in fig. 1, the extended valve stem 10 is provided with a lower lip seal 12 structure to prevent the valve stem packing from being damaged at low temperature. The lip-shaped ring structure below the lengthened valve rod is arranged, so that excessive low-temperature media can be effectively prevented from contacting with the valve rod packing when the valve is inclined and transversely installed, and the valve rod packing is prevented from being damaged at low temperature.
In this embodiment, as shown in fig. 1, electrostatic conduction springs 17 are further provided between the extended valve stem 10 and the extended valve cover 8, and between the extended valve stem 10 and the valve core. Still set up static conduction spring between extension valve rod 10 and extension valve gap 8 and extension valve rod 10 and case, the effectual static that produces valve internals is derived to valve shell, promotes valve safety in utilization.
In this embodiment, as shown in fig. 1, a drip tray 9 is further welded on the lengthened valve cover 8, so that the heat dissipation area of the lengthened valve cover 8 is increased, and condensed water is prevented from dripping into the heat insulation layer of the valve below. The drip tray 9 is welded on the lengthened valve cover 8 and has the function of increasing the heat dissipation area of the lengthened valve cover 8 and ensuring that the sealing assembly 5 is above 0 ℃, so that the sealing assembly 5 cannot be frozen to scratch the valve rod; the other function is to prevent the condensate water from dropping into the heat-insulating layer of the valve below and causing the damage of the heat-insulating layer.
The above-mentioned ultra-low temperature valve extension valve gap structure that this embodiment provided, the extension valve rod is installed in the extension valve gap, it is right to add the extension valve gap the extension valve rod plays the support positioning action. The lengthened valve rod drives the valve core to move by transmitting torque through the operating mechanism, so that the valve is opened or closed. The sealing problem of the lengthened valve rod of the ultralow-temperature valve is solved, and the ultralow-temperature valve can be transversely installed and the filler can be replaced on line under a certain working condition. The extension valve rod is provided with triple sealing, a sealing cavity pressure relief device and an anti-static device, and has a good practical effect on the ultralow temperature environment, particularly on the working condition that a medium is easy to gasify and explode.
Compared with the prior art, the ultra-low temperature valve adds extra long valve gap structure of this embodiment, it adds extra long valve rod and adds and is provided with triple seal between the support, can effectually prevent that the medium from the extra long valve rod position of valve from leaking, ensures the validity of valve external seal. The lip-shaped sealing ring below the lengthened valve rod can prevent a medium from directly contacting the packing component above the lengthened valve rod, the damage of the packing component and the scratch of the valve rod caused by icing of the packing part due to the fact that the excessive low-temperature medium directly contacts the packing component can be avoided when the valve is obliquely installed or transversely installed, and the problem that the valve cannot be installed due to space limitation in a construction site is solved. Meanwhile, after the packing of the lengthened valve rod is damaged, the packing sealing assembly can be directly dismantled on site to be replaced under a certain working condition due to the sealing effect of the lower lip-shaped sealing ring, and the on-site valve packing maintenance time is shortened. And the anti-static devices are arranged between the lengthened valve rod and the lengthened support as well as between the lengthened valve rod and the valve core, and through the connection between the valve shell and the grounding device, the static electricity of the valve internals can be effectively led out, so that the fire safety of field use is improved.
In the specific implementation, according to a preferred embodiment of the ultra-low temperature valve lengthened valve cover structure of the present invention, referring to fig. 1, a lengthened valve rod 10 is installed in a lengthened valve cover 8, a steel ball 14, a spring 15 and a hollow plug 16 are installed below the lengthened valve rod 10, then an anti-flying-out gasket 13, a lower lip-shaped sealing ring 12 and a shaft sleeve 11 are sequentially installed in sequence, and then the lengthened valve rod 10 is integrally sleeved in the lengthened valve cover 8, in the process, the lengthened valve rod 10 and the lengthened valve cover 8 need to be kept concentric, so that the lower lip-shaped sealing ring 12 is prevented from being damaged, and the lengthened valve rod 10 is prevented from being scratched. Then an upper lip-shaped sealing ring 7, a positioning block 6, a packing sealing component 5, a packing pressing sleeve 4, a packing pressing plate 3, a packing bolt 1 and a disc spring 2 are sequentially arranged from the upper end. And finally, integrally connecting the assembled lengthened valve cover 8 with the valve body, and finally adjusting the bolt of the packing pressing plate after the valve is integrally assembled to ensure that the bolt is properly tightened.
In the operation of the ultralow temperature valve, a pipeline medium passes through the valve core, the medium can be directly contacted with the lower lip-shaped sealing ring 12, the sealing ring realizes the first sealing, a small part of the medium which is possibly leaked can enter a cavity between the lengthened valve rod 10 and the lengthened valve cover 8, and then the upper lip-shaped sealing ring 7 and the packing component 5 form the second sealing and the third sealing to prevent the medium from leaking to the outside. Meanwhile, a small part of media which are possibly leaked are gasified in a cavity between the lengthened valve rod 10 and the lengthened valve cover 8, so that the pressure of the cavity is increased, when the pressure is increased to a certain range, the pressure pushes a steel ball 14 below the lengthened valve rod 10 and drives a spring 15, the pressure of the middle cavity is released to a valve pipeline, and the safe operation of the valve is ensured. When the pressure is released, the spring 15 pushes the steel ball 14 to form sealing with the lengthened valve rod 10 again, so that the medium is prevented from flowing to a cavity between the lengthened valve rod 10 and the lengthened valve cover 8, and the excessive low-temperature medium is prevented from contacting with the upper packing assembly 5 to damage the packing assembly 5.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the utility model; the above description is only for the specific embodiment of the present invention, and is not intended to limit the scope of the present invention; any modification, equivalent replacement, improvement and the like of the technical solution of the present invention by a person of ordinary skill in the art without departing from the design spirit of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims (9)
1. The utility model provides an ultra-low temperature valve extension valve gap structure, includes packing component (5), top lip seal (7), extension valve gap (8), extension valve rod (10) and below lip seal (12), its characterized in that: the lengthened valve rod (10) is arranged in the lengthened valve cover (8), is limited through an anti-flying-out gasket (13), and is circumferentially positioned through a positioning block (6) and a shaft sleeve (11), so that the lengthened valve rod (10) performs rotary motion relative to the lengthened valve cover (8); triple sealing is realized between the lengthened valve rod (10) and the lengthened valve cover (8) through an upper lip-shaped sealing ring (7), a lower lip-shaped sealing ring (12) and the packing component (5).
2. The ultra-low temperature valve extension valve cover structure of claim 1, characterized in that: and a closed cavity is formed among the lower lip-shaped sealing ring (12), the upper lip-shaped sealing ring (7) and the packing component (5).
3. The ultra-low temperature valve extension valve cover structure of claim 2, characterized in that: the lengthened valve rod (10) is provided with a pressure relief hole, and the end part of the pressure relief hole is provided with a steel ball (14), a spring (15) and a hollow plug (16) to form a one-way circulation device.
4. The ultra-low temperature valve extension valve cover structure of claim 1, characterized in that: and a packing pressing sleeve (4) and a packing pressing plate (3) are arranged above the packing sealing assembly (5).
5. The ultra-low temperature valve extension valve cover structure of claim 4, wherein: the packing pressing plate (3) is connected with the lengthened valve cover (8) through the packing bolt (1), and a disc spring (2) is arranged between the packing bolt (1) and the packing pressing plate (3) to realize pressure compensation.
6. The ultra-low temperature valve extension valve cover structure of claim 1, characterized in that: the anti-flying-out gasket (13) is arranged between the lengthened valve rod (10) and the lengthened valve cover (8), so that the lengthened valve rod (10) cannot fly out of the top end of the valve due to pressure when the middle cavity of the valve is pressurized.
7. The ultra-low temperature valve extension valve cover structure of claim 6, wherein: the lengthened valve rod (10) is provided with a lower lip-shaped sealing ring (12) structure, so that the valve rod packing is prevented from being damaged at low temperature.
8. The ultra-low temperature valve extension valve cover structure of claim 7, wherein: and electrostatic conducting springs (17) are arranged between the lengthened valve rod (10) and the lengthened valve cover (8) and between the lengthened valve rod (10) and the valve core.
9. The ultra-low temperature valve extension valve cover structure of claim 8, wherein: the water dripping disc (9) is welded on the lengthened valve cover (8), the heat dissipation area of the lengthened valve cover (8) is increased, and condensed water is prevented from dripping into the heat insulation layer of the valve below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121925313.XU CN215806728U (en) | 2021-08-17 | 2021-08-17 | Ultra-low temperature valve adds long valve gap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121925313.XU CN215806728U (en) | 2021-08-17 | 2021-08-17 | Ultra-low temperature valve adds long valve gap structure |
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| Publication Number | Publication Date |
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| CN215806728U true CN215806728U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121925313.XU Active CN215806728U (en) | 2021-08-17 | 2021-08-17 | Ultra-low temperature valve adds long valve gap structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
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2021
- 2021-08-17 CN CN202121925313.XU patent/CN215806728U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117108805A (en) * | 2023-10-18 | 2023-11-24 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
| CN117108805B (en) * | 2023-10-18 | 2023-12-29 | 东一阀门制造(南通)有限公司 | Ultra-low temperature valve extension valve gap structure |
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